<?php

if (empty($_GET['id'])) {
    header((isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.1') . ' 404', TRUE, 404);
    exit;
}

ob_start();
include('site_config.php');
ob_end_clean();

$id = mysql_real_escape_string($_GET['id']);
$result = mysql_query("SELECT image FROM frontpage_auto_slideshow WHERE id = '{$id}';");
if (mysql_num_rows($result) > 0) {
    $row = mysql_fetch_assoc($result);
    header('Content-Type: ' . Nette\Utils\MimeTypeDetector::fromString($row['image']));
    echo $row['image'];
}